[South Sound Steve]

I would like to mount downriggers on the gunnel between the two rod holders on a 2003 35 Tiara open. My preference would be to through bolt them with backing material rather than just screw them in to the fiberglass.

My question is, how thick is the gunnel, is it solid glass or is there some sort of core material, and are there any wires or hoses running under the gunnel I need to be aware of? Sort of a call before you drill type question.

Many thanks in advance

Steve